Mailbox



FIG. 1 is a top view of my new design for a mailbox;

FIG. 2 is a bottom view;

FIG. 3 is a right side elevational view (the front of the mailbox being to the left) with a front door in the open position, the left side view being a mirror image thereof; and,

FIG. 4 is a front elevational view with the door in the closed position, the rear view being a mirror image thereof. 

The ornamental design for a mailbox, as shown and described. 